How can I speed up my computer?

I'm currently running a 256RAM Pentium III piece of shit.

Running Firefox and winamp (with the classic skin) lags like a bitch.

How can improve my computers' response speeds without buying a new processor?

Start -> Run -> msconfig -> Startup
Uncheck everything

msconfig -> Services
Uncheck everything you don't need (check Hide Windows Services to help you)

Open the Group Policy editor (gpedit.msc)

Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options:

Recovery console: Allow floppy copy and access to all drives and folders (Enabled)
Shutdown: Allow system to be shut down without having to log on (Enabled)
Network access: Allow anonymous SID/Name translation (Disabled)
Network access: Do not allow anonymous enumeration of SAM accounts (Enabled)
Network access: Do not allow anonymous enumeration of SAM accounts and shares (Enabled)

Computer Configuration -> Administrative Templates -> Windows Components -> Windows Media DRM:

Prevent DRM (Enabled)
Computer Configuration -> Administrative Templates -> Control Panel -> Display -> Desktop Themes:

Remove Theme option (Enabled)

Computer Configuration -> Administrative Templates -> System:

Display Shutdown Event Tracker (Disabled)
Verbose vs normal status messages (Enabled)
Turn off Autoplay (Enabled)

User Configuration -> Administrative Templates -> Desktop:

Hide IE icon (Enabled)
Hide Recycle Bin (Enabled)

User Configuration -> Administrative Templates -> System:

Turn off Autoplay (Enabled, All drives)

My Computer -> Properties -> Advanced -> Appearance -> Best performance (haven't checked, I think that's what its called)